FR2549971B1 - Appareil pour visionner des vues par transparence - Google Patents

Appareil pour visionner des vues par transparence

Info

Publication number
FR2549971B1
FR2549971B1 FR8312364A FR8312364A FR2549971B1 FR 2549971 B1 FR2549971 B1 FR 2549971B1 FR 8312364 A FR8312364 A FR 8312364A FR 8312364 A FR8312364 A FR 8312364A FR 2549971 B1 FR2549971 B1 FR 2549971B1
Authority
FR
France
Prior art keywords
views
viewing transparency
viewing
transparency views
transparency
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
FR8312364A
Other languages
English (en)
Other versions
FR2549971A1 (fr
Inventor
Jean-Pierre Vitrac
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Stereoscopes Lestrade et Cie SA
Original Assignee
Stereoscopes Lestrade et Cie SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Stereoscopes Lestrade et Cie SA filed Critical Stereoscopes Lestrade et Cie SA
Priority to FR8312364A priority Critical patent/FR2549971B1/fr
Publication of FR2549971A1 publication Critical patent/FR2549971A1/fr
Application granted granted Critical
Publication of FR2549971B1 publication Critical patent/FR2549971B1/fr
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/02—Viewing or reading apparatus
    • G02B27/04—Viewing or reading apparatus having collapsible parts

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Sheet Holders (AREA)
FR8312364A 1983-07-26 1983-07-26 Appareil pour visionner des vues par transparence Expired FR2549971B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR8312364A FR2549971B1 (fr) 1983-07-26 1983-07-26 Appareil pour visionner des vues par transparence

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8312364A FR2549971B1 (fr) 1983-07-26 1983-07-26 Appareil pour visionner des vues par transparence

Publications (2)

Publication Number Publication Date
FR2549971A1 FR2549971A1 (fr) 1985-02-01
FR2549971B1 true FR2549971B1 (fr) 1985-12-20

Family

ID=9291129

Family Applications (1)

Application Number Title Priority Date Filing Date
FR8312364A Expired FR2549971B1 (fr) 1983-07-26 1983-07-26 Appareil pour visionner des vues par transparence

Country Status (1)

Country Link
FR (1) FR2549971B1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8927675D0 (en) * 1989-12-07 1990-02-07 Alexander William D Teaching aid

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3019691A (en) * 1959-11-12 1962-02-06 Harvey B Schneider Optical viewer particularly for micro film and transparencies
GB2031604B (en) * 1978-05-31 1982-06-23 Oakeridge Management Services Transparency viewer
US4242818A (en) * 1978-11-29 1981-01-06 Creative Cartons Of Ashland, Inc. Collapsible photographic slide viewer
CA1147997A (fr) * 1981-12-02 1983-06-14 John L. Head Visionneuse plastique reployable pour diapositives 35mm.

Also Published As

Publication number Publication date
FR2549971A1 (fr) 1985-02-01

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Legal Events

Date Code Title Description
ST Notification of lapse